package example2;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

/**
 * <h3>designPattern</h3>
 * <p>代理工厂类：ProxyFactory</p>
 * @author : zhang.bw
 * @date : 2021-02-27 14:44
 **/
public class ProxyFactory{

	//维护一个目标对象
	private Object target;
	public ProxyFactory(Object target){
		this.target=target;
	}

	//给目标对象生成代理对象
	public Object getProxyInstance(){
		return Proxy.newProxyInstance(
				target.getClass().getClassLoader(),
				target.getClass().getInterfaces(),
				new InvocationHandler() {
					@Override
					public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
						System.out.println("开始事务...");
						//执行目标对象方法
						Object returnValue = method.invoke(target, args);
						System.out.println("提交事务...");
						return returnValue;
					}
				}
		);
	}

}
